I recently moved into a house with a pellet stove. I don't think that the convection blower is working, as I don't feel hot air coming out of the heat exchanger tubes. I can feel radiant heat from the stove, but isn't air suppose to be blown out? I have taken the blower off and cleaned a massive amount of dust from the motor. However it still doesn't seem to work. Is there anything other than the motor being shot that might be causing this?